Concentrator construction



April 21,1925.

, R. A. LEAHY J CONCENTBATOR CONSTRUCTION Filed Sept. 15,- 1922 ATTORNEY.

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Patented Apr. 21, 1925.

UNITED STATES RICHARD A. LEAHY, OF BONNE TERRE, MISSOURI.

CONCENTRATGB CONSTRUCTION.

Application filed. September 15, 1922. Serial 1T0. 588,339.

To all whom it may concern:

Be it known that I, RICHARD A. Lnnrrr, citizen of the United States, residing at Bonne Torre, in the county of St. Francois and State of Missouri, have invented certain new and useful Improvements in Concentrator Constructions, of which the following is a specification.

This invention relates to new and useful improvements in ore concentrators and its primary object is to provide in connection with a reciprocating table of the type commonly used for the concentration of ores, ritiies of elastic material which by tneir inherent resilience effectually withstand the impact and abrasive action of material under treatment and thereby prolong the period of continuous efficiency of the apparatus and reduce the expense of maintaining the same in operative condition.

It is another object of my invention to provide a riitle of the hereinbefore described character which is re-cnforced to resist deformation by contact with liquid used in the concentration of ores and which by its said re-cnforcement is adapted for the retention of nails or other fastening means by which it is secured upon the surface of the table of which it is a part.

With the above objects in view my invention consists in providing a riftle made of vulcanized rubber re-enforced by a substance of less resilience. The elasticity of the rubber causes the riflie to withstand the impact and abrasion of the material passing across the surface of the concentrator, and its re-enforcement provides a. stable support for the nails by which the riifle is secured to the reciprocating table. The rc-enforcement furthermore gives to the riftle the vertical rigidity required to prevent its displacement or deformation by the movement of the material under treatment and it prevents swelling of the rubber by the moisture to which in wet concentration, it is continuously subjected.

An embodiment of my invention has been illustrated in the accompanying drawings in the several views of which corresponding parts are similarly designated and in which Figure 1 represents a plan view of a portion of a concentratingtable equipped with my improved riflies;

Figure 2, a longitudinal section on the line 2-2, Figure 1;

Figure 3, an enlarged cross-sectional view of one of the rifi'les; and

Figures land 5 similar views showing modifications in the form and arrangement of the re-cnforcements of the riflles.

Referring further to the drawings, the reference character 5 designates the table of an ore-concentrator, usually composed of a base 6 and a covering 7 of linoleum, rubher or other suitable smoothsurfaced material.

The improved riffles which extend longitudinally of the surface of the table in order to retain, catch and direct values in comminuted material which, by a vibratory movement of the table, is subjected to an intermittently retarded advancing motion, are composed of an elongate body 8 of vulcanized rubber re-enforced by longitudinally embe lded strips 9 of canvas or other suitable material.

The rifile is fastened to the table by nails 10 driven between adjoining plies 0f the re enforcing fabric and it is preferred that the rubber covering the re-enforcement be thicker on the side receiving the direct impact of the material passing over the table, in order that the part 8 of the riflie with which the material comes in contact shall have a greater degree of resilience, and con sequently greater resistance to wear.

Another method of fastening the riiiles consists in setting their lower portions in recesses r channels formed in the surface of the concentrator deck or table, as shown in Figure 4t, in which case the nails may be made lighter or can be dispensed with.

In the form of my invention shown in Figures 2 and 8, the re-enforcing strips extend to the upper surface of the rubber body of the ririe, and in the modification illustrated in Figure l, they terminate at a dis tance beneath said surface to provide a resilient top portion 8 which increases the wear-resisting quality of the rii'ile and protects the fabric re-enforcements from the dcteriorative effects of moisture.

The modified form of the invention illustrated in Figure 5 differs from the others in that the re-enforcement consists of rope 12 made of inter-twined fiber strands or twisted wires. The re-enforcement may also be made of rubber of less resilience than that of the body portion of the rifile, wood strips, wood fiber or other similar material.

Having thus described my improved concentrator construction, I desire it understood that modifications other than those shown and heremabove described, may be availed of within the spirit of the invention; that.

the rubber body of the ril'lle may be of any form and proportions as are best suited to adapt it for use under different circumstances and conditions, and that the reenforcements may be made of any suitable material and in any desired form and thickness.

lVh-at I claim and desire to secure by Letters Patent is: V

1. A concentrating table having laterally resilient riflles of reenforced soft rubber extending transversely to the flow of material across the surface thereof, and fastening members engaging with the reenter-cements to fix the riflles against bodily displacement on said surface.

2. As a new article of manufacture, a laterally resilient rifl'le for concentrating tables composed of an elongate body of soft rubber, and longitudinal reenforcement embedded in said body at unequal distances from its sides.

As a new article of manufacture, a laterally resilient riiile for concentrating tables composed of an elongate body of soft rubber, and alongitudinal reenforcement embedded in said body between its sides and at a distance below its top.

In testimony whereof I have affixed my signature.

RICHARD A. LEAHY. 

